no luck..., i even tried different folders, i can generate the player stats and song catalog without problems. The folders are D:\portable\Steam\userdata\204524116\221680\remote\60D4F38CF7DD492B81816A611EF18609_PRFLDB and destDir=D:\portable\Downloads dlcDir=D:\portable\Steam\SteamApps\common\Rocksmith2014\dlc I have the _m.psarc and _p.psarc in the dlc folder. I think the error window stating the pid counts holds the clue to the problem. It is for the backup file 599 > 588, after playing some new songs 604 > 593, then i did a sync of the PRFLDB with all sync options, 27 % size reduction then tried again... now the message was saying 327 (stats) > 316 (songs) The difference is always the same (11). I've not deleted any files from dlc folder. The song catalog lists 2681 rows with 1886 different GUIDs. In the catalog i have an Artist name starting with a blank space and some names containing non ASCII characters, UTF8 encoded. An Ö, an Ä and a special apostrophe, maybe more. Also all kinds of special characters including ; : + / ? ! ' And there are filenames with spaces. Any idea?